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Animation: World’s Largest Megacities by 2100

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Animation: The World’s Largest Megacities by 2100

Throughout the course of human history, the biggest cities have always seemed impossibly large.

For many millennia, it was almost unfathomable for a city to sustain more than 1 million residents. In fact, it wasn’t until the 19th century that the largest cities globally, such as London and Beijing, were able to consistently hold populations beyond that impressive mark.

Despite this, in the modern era, we’ve quickly discovered that a city of 1 million people isn’t remarkable at all. In China alone, there are now over 100 cities with a million people today – and as such, our mental benchmark for what we consider to be a “big city” has changed considerably from past times.

Thinking Big

Just like a city the size of modern Tokyo was hard to imagine for someone living in the 19th century, it can be an extremely difficult thought experiment for us to visualize what future megacities will look like.

Researchers at the Global Cities Institute have crunched the numbers to provide us with one view of the potential megacities of the future, extrapolating a variety of factors to project a list of the 101 largest cities in the years 2010, 2025, 2050, 2075, and 2100.

Today’s video uses this data – it’s also an extension to the previous work we did based on the report here.

The Largest Megacities by 2100

According to the report, human geography will look completely unfamiliar by the turn of the century.

Here is a list of the 20 largest megacities projected for 2100:

RankPopulation (2100)CityCountry
#188.3 millionLagosNigeria
#283.5 millionKinshasaDRC
#373.7 millionDar Es SalaamTanzania
#467.2 millionMumbaiIndia
#557.3 millionDelhiIndia
#656.6 millionKhartoumSudan
#756.1 millionNiameyNiger
#854.3 millionDhakaBangladesh
#952.4 millionKolkataIndia
#1050.3 millionKabulAfghanistan
#1149.1 millionKarachiPakistan
#1246.7 millionNairobiKenya
#1341.4 millionLilongweMalawi
#1440.9 millionBlantyre CityMalawi
#1540.5 millionCairoEgypt
#1640.1 millionKampalaUganda
#1740.0 millionManilaPhilippines
#1837.7 millionLusakaZambia
#1936.4 millionMogadishuSomalia
#2035.8 millionAddis AbabaEthiopia

By the year 2100, it’s estimated that 13 of the world’s largest megacities will be located in Africa. Meanwhile, India will hold three of them – and there will be zero of them found in the Americas, China, or Europe.

Here’s a final look at the top three:

#1: Lagos, Nigeria
Nigeria’s largest city, Lagos, is expected to push the limits of how big a metropolis can get. Already, Lagos has seen explosive growth over the past few decades, and is growing so fast that no one really knows how many people live there. Over 2,000 people emigrate to the city every day, and current population estimates vary widely from 11 to 21 million inhabitants.

Either way, by the turn of the century, Lagos is projected to have a population north of 88 million.

#2: Kinshasa, DRC
Kinshasa, the capital of the Democratic Republic of Congo is projected to be the second largest city in the world with a population of 83 million.

#3: Dar Es Salaam, Tanzania
Dar Es Salaam, a city on the coast of Tanzania, has a population of just 4.4 million today. By 2100, its population is projected to jump by a whopping 1,588%, putting the total at 74 million inhabitants.

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Ranked: The World’s Top Flight Routes, by Revenue

In this graphic, we show the highest earning flight routes globally as air travel continued to rebound in 2023.

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The World’s Top Flight Routes, by Revenue

This was originally posted on our Voronoi app. Download the app for free on iOS or Android and discover incredible data-driven charts from a variety of trusted sources.

In 2024, a record 4.7 billion people are projected to travel by air—200 million more than in 2019.

While revenues surged to an estimated $896 billion globally last year, airlines face extremely slim margins. On average, they made just $5.44 in net profit per passenger in 2023. Today, the industry faces pressures from high interest rates, supply chain woes, and steep infrastructure costs.

This graphic shows the highest earning flight routes worldwide, based on data from OAG.

The Top Revenue-Generating Routes in 2023

Below, we show the airline routes with the highest revenues in the first half of 2023:

Route Airport CodesRevenue H1 2023
Sydney to MelbourneSYD-MEL$1.21B
New York to LondonJFK-LHR$1.15B
Riyadh to JeddahRUH-JED$1.03B
Dubai to RiyadhDXB-RUH$990M
Los Angeles to New York LAX-JFK$801M
San Francisco to NewarkSFO-EWR$722M
Newark to Los AngelesEWR-LAX$682M
Singapore to SydneySIN-SYD$650M
New York to Paris JFK-CDG$647M
Perth to MelbournePER-MEL$642M

As we can see, domestic flights comprised six of the 10 largest revenue-generating flights, with Sydney to Melbourne ranking first overall, at $1.21 billion.

In fact, this route is earning more than twice that of pre-pandemic levels, even as the number of passengers declined. The flight route is largely dominated by Qantas and Virgin Australia, with Qantas achieving record-breaking domestic earnings margins of 18% in the fiscal year ending in June 2023. Lower fuel costs and soaring ticket prices were key factors in driving revenues.

Furthermore, Qantas and Virgin Australia are major carriers for flights between Melbourne and Perth, another top-earning route.

New York to London, one of the busiest and most profitable routes globally, generated $1.15 billion in revenues, representing a 37% increase compared to the same period in 2019. Overall, the flight route had 3.88 million scheduled airline seats for the full year of 2023.

The highest revenue increase over this period was for flights from Dubai to Riyadh, with revenues surging 416% year-over-year. This two-hour flight, a highly lucrative route between major financial centers, is one of the busiest in the Middle East.

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